New aerial Apple Park video shows mystery rainbow stage

Captured at several times of day, the video by Duncan Sinfield shows not just a stage, but crews working on setting up lighting and other equipment. Apple also appears to have cleared out substantial audience space, enough for hundreds of people.

It's not clear when construction began or what the stage is for. One likelihood is that the company is preparing an employees-only concert, something relatively common with rich Silicon Valley corporations looking to motivate workers and keep them loyal. The Valley is infamous for its turnover, since many residents are skilled and experienced enough to have their pick of employers.

It's also possible that Apple is hosting a celebrity talk, however, or a more mundane event such as an internal anniversary or awards ceremony. Will, Jaden, and Jada Smith visited for an environmental event in April.

Drone flights have become less common over Apple Park since its construction was largely completed in early 2018.